quadtree Questions
2
Solved
What is the main difference between a quadtree and kd-tree? I understand they split points in many dimensions, but I do not understand why we would use one over the other.
I need a structure that a...
Stiffen asked 21/11, 2012 at 6:59
3
I have a set of latitude and longitude for various locations and also know the latitude and longitude of my current location. I have to find out the nearest places from current location.
Which al...
Woodenware asked 18/3, 2017 at 11:4
2
Solved
I'm searching for a algorithm to find neighbors of a quadtree, in the example image, I got the red node, how to find the blue nodes. Any ideas?
1
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I was reading this answer
Efficient (and well explained) implementation of a Quadtree for 2D collision detection
and encountered this paragraph
All right, so actually quadtrees are not my favo...
Quade asked 17/1, 2020 at 22:20
1
Solved
I'm trying to build a quadtree which subdivides a region based on a position and a maximum depth. I want to use this to implement level of detail in terrain. In other words I have a position (x, y)...
Mucoviscidosis asked 4/11, 2017 at 20:54
8
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I have recently learned about binary space partitioning trees and their application to 3d graphics and collision detection. I have also briefly perused material relating to quadtrees and octrees. W...
Bulldoze asked 19/9, 2008 at 5:8
7
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I've been working on adding a Quadtree to a program that I'm writing, and I can't help but notice that there are few well explained/performing tutorials for the implementation that I'm lookin...
Mighell asked 30/1, 2017 at 21:50
2
I have a following path data:
id1 p1 p2
0 1 7.935 5.103
1 1 7.934 5.112
2 1 7.936 5.102
3 1 7.938 5.145
4 2 7.930 5.191
5 2 7.945 5.161
6 2 7.954 5.127
In the above data frame, (p1,p2) f...
Unstep asked 24/5, 2017 at 1:45
3
I am new to ElasticSearch and I want to understand the difference between using geohashes and quadtree. In the reference it is written:
GeohashPrefixTree - Uses geohashes for grid squares. Geohas...
Anhedral asked 12/5, 2015 at 5:36
2
I'm in the process of creating an offline Slippy Map using QML and their new QtLocation module (>=Qt5.4). I managed quite easily to display the tiles with an offline cache.
Now I would like to add ...
3
Solved
Setup
Function will need to provide the distance from a point to the closest edge of a polygon
Point is known to be inside of the polygon
Polygon can be convex or concave
Many points (millions) w...
3
I am trying to write code for simulating n-body problem using the Barnes-Hut tree algorithm. I plan on using CUDA in the future and thus want my quadtree data structure to not be composed of heap o...
3
Solved
I understand how quad trees work on square images (by splitting the image until the section is a single colour, which is stored in the leaf node).
What happens if the image has one dimension longe...
Middleclass asked 13/2, 2011 at 16:11
3
I'm trying to implement a forward iterator for a quadtree. Unfortunately I don't seem to be able to find any resource about traversal in a quadtree.
Can anybody point me in the right direction?
3
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I'm trying to use a quadtree for 2D collision detection, but I'm a little stumped on how to implement it. First of all, I'd have a quadtree which contains four subtrees (one representing each quadr...
Xuthus asked 13/2, 2011 at 1:34
2
Solved
I want to compare the R-Tree and the Quadtree for geospatial data. While there is literature out there I struggle to find documents that cover real basic comparison. So I decided to ask this questi...
Mishnah asked 22/4, 2014 at 9:58
8
Solved
By way of an intro, I'm creating a basic Quadtree engine for personal learning purposes. I'm wanting this engine to have the capability of working with many different types of shapes (at the moment...
1
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I want to implement PMR Quadtree which can process points and random polygons instead of point only as traditional QuadTree in below demo
http://donar.umiacs.umd.edu/quadtree/lines/pmr.html
...
2
All,
There are a few examples on implementing a quadtree using Python but my question is, does anyone know of a class written in pure python as in a single .py file that I can easily include in my...
4
Solved
It appears that a certain project of mine will require the use of quad-trees, something that I have never worked with before. From what I have read they should allow substantial performance enhance...
Windtight asked 19/2, 2010 at 17:59
1
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I have implemented a quadtree structure for n points as well as a method for returning an array of points within a given rectangle. I can't seem to find an algorithm to efficiently find the point t...
Pursuance asked 30/12, 2013 at 10:21
1
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I am working on implementing a voxel octree raycaster, and the only thing left is rearranging the data to populate the leaf level of the octree, so that the data then can be averaged to build the l...
2
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I'm going to write a templatized implementation of a KDTree, which for now should only work as Quadtree or Octree for a BarnesHut implementation.
The crucial point here is the design, I would like...
Shipp asked 15/5, 2012 at 11:1
1
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I've been studying this:
https://github.com/mikechambers/ExamplesByMesh/blob/master/JavaScript/QuadTree/src/QuadTree.js
and I believe I understand the general idea about quad trees, although I do...
Corral asked 18/3, 2012 at 21:32
1
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I am writing a removal method for a quad tree.
Now when you remove an item in a node, you will need to check its siblings to see if you need to collapse the nodes and merge them into one.
For ch...
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